PRESS RELEASE
30 March 2026

Goodwin Guides Poplar Therapeutics On Closing $45 Million Series A Extension

GP
Goodwin Procter LLP

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The Life Sciences team advised Poplar Therapeutics, Inc. on the closing of its Series A extension round, bringing its total Series A financing to $95 million.
United States

The Life Sciences team advised Poplar Therapeutics, Inc. on the closing of its Series A extension round, bringing its total Series A financing to $95 million. The round was led by Janus Henderson Investors with RA Capital also participating as a new investor. The financing was further supported by existing investors, including SR One, Vida Ventures, and affiliates of ArrowMark Partners. The additional capital from this financing will support the continued advancement of its lead asset, PHB-050, through clinical development.

Poplar Therapeutics, Inc. is a clinical-stage immunology company developing a new class of anti-IgE therapy to challenge convention in treating allergic disorders, which was incorporated in 2024. Its lead program, PHB-050, is a next-generation anti-IgE antibody with a unique triple-action design currently being studied in atopic diseases. Poplar is pursuing the bold idea that IgE can be rapidly driven toward zero, with the goal of helping people with IgE-mediated conditions move from fear toward freedom.

The Goodwin team was led by Kevin Kabler and Zach Newman.

For more information on the deal, please read the press release.

Contributor

At Goodwin, we partner with our clients to practice law with integrity, ingenuity, agility, and ambition. Our 1,600 lawyers across the United States, Europe, and Asia excel at complex transactions, high-stakes litigation and world-class advisory services in the technology, life sciences, real estate, private equity, and financial industries. Our unique combination of deep experience serving both the innovators and investors in a rapidly changing, technology-driven economy sets us apart.

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